High-speed dynamo-electric machine.



A. H. WOUTERS. HIGH SPEED DYNAMO ELECTRIC MACHINE.

Patented June 22, 1909.

lllllll LED NOV. 3, 1906 OATION PI [Hill UNITED STAilES CORPORATION or NEW messy; AND PANYI, A- CORPORATION or 011101 Specification of Letters IC atent.

Bl?'LLO(JK ELECTRIC NANUFAGTU'R TNG (303l- HIGH-SPEED nrneiaonrinornrc rv'reonrnnlfi Patented June 22, 1909.

Application filed November 3, 1906. Serial No. 3 ll,81&.

Teal?! whom it may concern:

Be it known "that I, ALFRED H. \Vournns, elonging to the Kingdom of the Nether is, residing at Norvvood,in the county of amilton and State of Ohio, have invented r rtain new and useful Improvements in High-Speed Dynamo-Electric Machines, of nich the following is a full, clear, and exact- -=pecification.

My invention relates to dynaino electric machines and particularly to high speed direct current machines, such as direct current turbogenerators.

r- In some types of machines particularly high speed machines, it is necessary to proidtie auxiliary field windings to improve commutation. These windings are generally arranged on auxiliary poles midway between the main poles so as to provide commutating fieldsforf the short-circuited-coils, or are distribnted in slots. adjacent the armature so as to balancethe armature reaction. Either or nth arran ements may be employed as con- 'ons' of esign, use, and modeot operation uire The coils of the distributed auxilrywinding are sometimes arranged in slots k the irinerends or the field poles only,-or e-megnetio bridgin members may be proaided between the po es, and the windings at anged in slots in said non-magnetic bridgmernbel's as well as in the ends oi the field oles. With either arrangement, to tissern le, connect and secure the coils of the distributed Winding in position requires the exnenditure ofconsiderable time and labor. litis therefore highly desirable that the coils never be disturbed or removed unless it is absolutely necessary to do so. However, it frequently happens that the main field wind? ings must. be removed or replaced as is the case when a coil is burned out or otherwise injured. In the machines as heretoforeconstructed' having a distributed auxlhary field Winding it has been necessary to remove a section of the auxiliary field winding to remove a main field coil.

The object of my invention is to provide means whereby a field coil can be removed from a field pole without rendering necessaryfa removal of the auxiliary winding or a portion of the same, or without otherwise disturbing said Windin T In carrying out my inventiom-l prov de a dynamo-electric machine with main and auxinvention, parts he iliary field windings, the parts being so constructed that the main field winding is removable without disturbing the auxiliary field winding.

More specifically considered, my invention consists in a dynamo-electric nuclune having field poles carrying main field coils, he poles and coils being divided into sections, hridging members between the field poles and a distributedauxiliarj field winding carried by the inner ends of the poles and the bridging members, the parts being so arranged and constructed that the outer sections of the poles and of the main field coils can be re moved without disturbing the inner sect-ions of the poles, the bridging members, and the auttiliarymfield winding car ied th reby.

My invention still furtiier consists in cerrain novel combinations and arrangements of parts described in the specification and set forth in the appended claims.

For a better understanding of my invention, reference is bad to the accompanying drawings in which Figure 1 is a partial end elevation of a machine equipped with my in section; and Fig. is'a partial longitudinal section, the sec tion being taken approximately through the center of one of the main field poles.

Referring now to the figures ot the drawing, 10 represents an armature or a macnine equipped with my invention, which arinzu ture is mounted on a shaft 11, adjacent the coi'n'inutator 12. The ariual'iu'c forms no part of my present intention and is accordinglv shown merely in outline. Surrtuindiug the armature is a stationary lield member13. The field u'uanhcr comprises a yoke 141 having at each side an end housing. E):- lending inwardly from the field yoke and removably secured thereto are a plurality of main field poles 15, in this case tour in number. Each field pole consists of two main sections, the outer section 16 or which is ,jsolid, in this instance, and the inner section 17 of which is laminated. The two sections or each pole are held to the frame by bolts 18 which pass entirely through the solid section 17 and engage nuts 19 embedded in the inner laminated section. he main ficld winding is mounted on the hold poles, the winding on each polo consisting of two ends '20 and "21. The two coils are in this case spaced apart hr bloclcs or strips 22, the line of division between the sections of the pole occurring between the two coils on the pole. I have in this instance shown concentrated auxiliary field windings for producing a commutating field and also distributed auxiliary windings for balancing or neutralizing the armature reaction but the former may ifmain pole shoes there is a continuous metallic brie go. In case the auxiliary windings 23 and poles 2% are dispensed with, the non-magnetic bridging members extend from pole to pole. The main pole shoes 25 and bridging members 26 are provided with slots adjacent the air gap 01 the n'iachine. Locatedin the slots are the conductors of. the distributed auxiliary winding 29. In this case, the coils of this winding are arranged in groups, each group consisting of concentric coils carried by a pair of adjacent poles and the intermediate non-magnetic bridging members. Preferably the coils are held in the slots in the pole-shoes by wedges 30- of non-magnetic material 'andin the slots of the non-magnetic bridging members 26 by strips 31 which may be screwed to the bridging members. Now, in case it is desired to remove one of the field-coils it is unnecessary to remove a section of the distributed balancing winding asin the previous constructions. All that is necessary is to remove the bolts 1S which secure the field pole to'the yoke. When the bolts are removed the outer secton 16 of the pole and the. coil Q0 of the main field-winding can be-removed vleaving the innerend' of the pole and the inner coil 21, whillh are supported by the bridging members. In case it is desired to remove the inner coil 21, the latter can he slid outward oil the inner section of the .pole.

If desired the inner end of the pole may be supported by other means in addition to the bridging members, when the outer end of the pole is removed, especially when the inner ends of the poles are very heavy.

-I do not wish to be confined to the exact details shown but aim in my claims to cover all modifications which do not involve a departure'from the spirit and scope of my invention.

What I'claim as new anddesire to secure by Letters Patentis Z- 1. In a dynamo-electric machine, a field yoke, separable field poles, means far fa-s toning said poles to yoke, main field field pole section and a me yersely into relatn ease? coils on said poles, distributed auxiliary field coils on the-inner ends of said poles, and additional means for supporting said auxiliary coils when said pole fastening means are removed, whereby the removal of said main field coils without disturbing the auxiliary field coils and without changing the position of the ,tield yoke or any part of same is permitted.

2. In a dynamo-electrie machine, a field frame, field poles, main and auxiliary field windings, the auxiliary field winding being a distributed one mounted upon the inner ends of the poles, said poles being divided transversely into relatively removable sections, means for fastening said pole sections to said field frame, and additional means for supporting the inner sections of said poles, whereby the outer sections and main field winding may be removed without disturb: ing the inner sections and the auxiliary field winding carried thereby.

3. In a dynamo-electric machine, an armsture, a field frame, field poles secured thereto, main and auxiliary 'iield windings carried by said field poles, the auxiliary wind-, ing being distributed around the space in which the armature rotates and located at the inner ends of the poles, each of said poles consisting of two parts or sections, the parts or sections being removable from each other and from the frame, means for fastening said sections to said frame, and additional means for suppoiting the inner sections of the poles independently of the outer sections when the latter sections are removed.

at. In a dynamo-electric machine,ia field frame, field poles secured thereto, main field coils carried thereby, each pole and the field coils surrounding same being divided into sections in planes perpendicular to the pole axis, means for fastening said pole sections to said frame, rigid bridging members between the poles, and an auxiliary distributed field winding carried by the inner sections or" the poles and by the bridging members, the bridging members bracing and supporting the inner sections to permit anon o l be removed from the field disturbing the auxiliai" winding" 5. In a dynamoelectric meehi frame, main field poles and comm field'poles carried thereby, 'non bridging members between of the main field poles andthe field poles and fastened the tributed auxiliary wind" main field p ice and said main field-pol and subdivided i field poles, such thatfthe main co is a of the main field poles may be removed from the machine without. disturbing the distributed auxiliary Winding or the field :fiame.

6. In a dynamo electrie machine, a field frame, main field poles mounted therein, a distributed auxiliary Winding mounted in.

si'ots 'i'n the faces of the main field poles, -said main field poles being divided trans versely into relatively removable secti0ns,.

coils on said main field poles, commutating field poles also mounted in said field frame,

and means for fastening the inner sections poles are remox'edfrom the machine.

In testimony whereof I afiix my signature, 2 m the presence of two witnesses.

ALFRED H. VVOUTERS.

Witnesses:

ARTHUR F. KwIs, GEo. B. Semen 

